TM 5-3805-260-24 SYMPTOMS CAUSE REMEDY B. Compressor cylinder head   B. Inspect the compressor discharge port and head discharge line discharge line for carbon build-up.  If carbon restrictions. is detected, check for proper cooling to the compressor.  (See Cause and Remedy (D) under Symptom #30.) Inspect the discharge line for kinks and restrictions.  Replace dischage line as necessary. C. Worn or burned out C. Check for proper oil pressure in the bearings. compressor.  Minimum required oil pres- sure; 5 psi engine idling, 15 psi maximum governed engine rpm.  Check for excessive oil temperature-should not exceed 240° F. D.    Faulty compressor. D.    Replace or repair the compressor after determining none of the preceding installa- tion defects exist. 32.  Excessive build-up and A.    Dirty induction air filter. A.    Inspect engine or compressor air filter and recovery time.  Compressor replace if necessary. should be capable of building B.    Restricted induction line. B.    Inspect the compressor air induction line for air system from 85-100 psi in for kinks  and  restrictions and 40 seconds with engine at replace as necessary. full governed rpm.  Minimum compressor performance is C.    Restricted discharge line C.    Inspect the compressor discharge port and certified to meet Federal or compressor discharge line for restrictions and carbon build-up. requirements by the vehicle activity. If a carbon build-up is found, check for manufacturer.  Do not proper compressor cooling. down size the original Replace faulty sections of the discharge equipment compressor. line. D.    Slipping drive D.    Check the condition of drive belts and replace components. or tighten, whichever is appropriate. E.  Excessive air system E.    Test for excessive system leakage and repair leakage. as necessary.  Use the following as a guide: Build system pressure to governor cutout and allow the pressure to stabilize for one minute.  Using the dash guage, note the system pressure and the pressure drop after two minutes. The pressure drop should not exceed: 1. 2 psi in each reservoir for a single vehicle. 2. 6 psi in each reservoir for a tractor and trailer. 3. 8 psi in each reservoir for a tractor and 2 trailers. F. Sticking unloader pistons F. Check the operation of the unloading and plungers. pistons in the inlet cavity of the com- pressor.  Both pistons should have the plunger flanges resting on the inlet cavity floor when the compressor is loaded (pumping air).  If the pistons and plunger are not fully retracted, check for proper opera- tion of the compressor air governor.  If the 2-36